how many moles are in 1.20 times 10^25 atoms of phosphorus

Part C the answer is Δ[S8]/Δt = 0.0026 M/s

Parte D the answer is v = 0.0026 M/s

Benefits for the environment: Liquid CO2 is a freely available, non-flammable, and non-toxic solvent that is derived from the atmosphere. It is an environmentally favourable solvent alternative liquid carbon

Liquid carbon is a dark, tar-like substance that is created during the pyrolysis of organic materials like wood, coal, and petroleum. It is also known as liquid carbonaceous material or liquid carbon black. It is a complex amalgam of organic substances, primarily made up of carbon, hydrogen, and oxygen.The manufacturing of carbon fibres, carbon black, and activated carbon are only a few industrial uses for liquid carbon. As a feedstock, it is also used to make compounds like acetylene and carbon disulfide.Yet, since it is a source of greenhouse gas emissions and air pollution, the production of liquid carbon may have a detrimental influence on the environment. The development of more ecologically

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The molecular formula for a compound that contains 69. 5% oxygen and 30. 5% nitrogen is N204.

The molecular formula expresses the number of atoms of each element in one chemical molecule.

The definition of a molecular formula is the formula that shows the exact number of atoms in a molecule.

The empirical formula is used to derive the Molecular Formula when the molar mass value is known.

n = empirical formula molar mass/mass

The molecular formula is frequently the same as or an exact multiple of an empirical formula.

Moles of oxygen = 69.5/16 = 4.34

Moles of nitrogen = 30.5/14 = 2.18

Ratio of moles of N and 0 = 2.18:4.34

Empirical formula = NO2

Molecular formula = (NO2)n

where n= Molecular mass/Empirical mass = 92/46 = 2

Therefore, the formula of the compound is N204.

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Answer:

hsvrirdhbrkshdbejdkjf

Explanation:

fndvizhdjevsixndbs

Answer:

A. The chemical changes occurred because the chemicals changed.

Explanation:

When baking a cake several chemical reactions occur that change the chemical composition of the ingredients used in baking. An ingredient like baking powder releases carbon dioxide when it undergoes a temperature change in the oven. A chemical change is supposed to change the form of a substance.

An endothermic reaction also occurs when the ingredients absorb heat energy to produce several changes. The firmness of the cake occurs because of the heat absorbed by the proteinous content of the egg.

The percentage yield of the given reaction is 77.33%.

What is percentage yield?
Reactants frequently produce fewer product quantities than predicted by the chemical reaction's formula. The percentage of a theoretical yield that's been produced in a reaction is calculated using the percent yield formula. Working through a stoichiometry problem yields the theoretical yield, which is the ideal quantity of the final product. The actual yield is determined by calculating the volume of the product formed. We can determine the percentage yield by dividing the actual yield by the theoretical yield.

Moles is calculated by using the formula:
Moles of Ammonia:
Given mass of ammonia = 150g
Molar mass of ammonia = 17 g/mol
Putting values in above equation, we get:

Moles of Oxygen
Given mass of oxygen = 150g
Molar mass of oxygen = 32 g/mol
Putting values in above equation, we get:
For the given chemical equation:

By Stoichiometry,
5 moles of oxygen reacts with 4 moles of ammonia.
So, 4.6875 moles of oxygen will react with =  of ammonia
As, moles of ammonia required is less than the calculated moles. Hence, ammonia is present in excess and is termed as excess reagent.
Therefore, oxygen is considered as a limiting reagent because it limits the formation of products.

By Stoichiometry of the given reaction:
5 moles of oxygen gas produces 4 moles of nitric oxide
So, 4.6875 moles of oxygen gas will produce =  of nitric oxide

Now, to calculate the theoretical amount of nitric oxide, we use equation 1: Molar mass of nitric oxide = 30 g/mol
 Given mass of nitric oxide = 112.5 g
Now, to calculate the percentage yield, we use the formula:
Experimental yield = 87 g
Theoretical yield = 112.5 g
Putting values in above equation, we get:
Hence, the percentage yield of the given reaction is 77.33%.

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Answer:

depends...

on how difficult it is

The thermal cycler works by controlling the temperature of the reaction mixture in small tubes or wells, cycling the temperature repeatedly through different stages. The two statements in the question are correct.

A thermal cycler is an essential tool used in the process of Polymerase Chain Reaction (PCR).

The main function of a thermal cycler in the process of PCR is to regulate the temperature of the reaction mixture in small tubes or wells.

The temperature cycling is carried out repeatedly, and the temperature is kept within specific ranges that allow for optimal amplification of the DNA sequence.

It is called a thermal cycler because it repeatedly heats and cools the tubes.

The thermal cycler also uses a Peltier block to heat and chill the tubes very quickly.

The Peltier block is the heart of the thermal cycler.

It is a thermoelectric device that uses the Peltier effect to regulate the temperature of the reaction mixture by moving heat from one side of the block to the other.

The Peltier block is made up of two plates, a positive plate, and a negative plate.

When an electrical current is passed through the block, the positive plate becomes hot, and the negative plate becomes cold.

The heat is then removed from the reaction mixture, causing the temperature to drop.

When the current is reversed, the plates switch roles, and the temperature rises.

The use of a thermal cycler in PCR is crucial to achieve the correct temperature cycles needed to amplify the target DNA sequence.

Therefore, a thermal cycler plays a vital role in the success of the PCR reaction.

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The uncertainty in the measured fluid mass can be determined by using the formula given below;$$\text{Uncertainty} = \frac{m_f - m_e}{t} $$Where, $m_f$ is the mass of the full beaker, $m_e$ is the mass of the empty beaker, and $t$ is the time interval.

Substituting the given values, we get;$$\text{Uncertainty} = \frac{250 g - 150 g}{20 s} = \frac{100 g}{20 s} = \boxed{5 \ g/s}$$Therefore, the uncertainty in the measured fluid mass is 5 g/s.

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The uncertainty in the measured fluid mass is ±0.1 g. The uncertainty in the measured fluid mass can be determined by considering the precision of the measurements.

In chemistry, uncertainty refers to the inherent variability or lack of exactness in measurements and calculations performed during experimental procedures or data analysis. It arises from limitations in the precision of measuring instruments, uncertainties in the experimental conditions, and the presence of random or systematic errors.

To determine the uncertainty in the measured fluid mass, we need to subtract the mass of the empty beaker from the mass of the full beaker. The difference in mass represents the mass of the fluid.

Mass of fluid = Mass of full beaker - Mass of empty beaker

Mass of fluid = 250 g - 150 g

Mass of fluid = 100 g

Since the masses are given with one decimal place (e.g., 150 g and 250 g), we can assume that the uncertainty in the measurements is ±0.1 g.

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Based on the molar concentration, the volume of  FeCl₃ required is 371 mL

The mole ratio of the reaction is determined from the equation of the reaction as follows:

Equation of reaction: FeCl₃ (aq) ----> Fe³⁺ (aq) + 3 Cl⁻ (aq)

From the equation of reaction, the mole ratio of FeCl₃ to Cl⁻ is 1 : 3

The moles of chloride ions in 650 mL of  0.300 M is calculated from the formula below:

Moles of Cl⁻ ions = 0.300 * 650/100

Moles of Cl⁻ ions = 0.195

Moles of FeCl₃ required =  0.195/3

Moles of FeCl₃required = 0.065

volume of  FeCl₃ required = 0.065 / 0.175

volume of  FeCl₃ required = 0.371 L or 371 mL

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Answer:

None of the above

Explanation:

Erikson's was a student of freud's and expanded of his theory of psychosexual development by emphasizing the importance of culture in parenting practices and motivations and adding three stages of adult development.

Many agricultural practices involve the emission of greater amounts of methane. The two agricultural practices which result in methane emission is manure management techniques and rice cultivation. The correct options are C and D.

The methane is defined as the simplest hydrocarbon with a chemical formula CH₄. It contains four 'H' atoms and one 'C' atom and it is the simplest alkane.

The main sources of methane emissions from agriculture are enteric fermentation, manure management, rice cultivation and residue burning. The production of methane also occurs animal wastes. Methane emissions occurs from paddy rice when soils are flooded.

Thus the correct options are C and D.

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The original volume of HBr that was titrated can be calculated as the ratio of the moles of HBr to its concentration.

To determine the original volume of HBr that was titrated, we can use the concept of stoichiometry and the equation balanced for the neutralization reaction between HBr and KOH.

The balanced equation is:

HBr + KOH → KBr + H₂O

From the balanced equation, we can see that the stoichiometric ratio between HBr and KOH is 1:1. This means that for every mole of HBr, we need an equal number of moles of KOH to complete neutralization.

First, let's determine the moles of KOH used in the titration:

Moles of KOH = 0.500 M × 0.075 L = 0.0375 mol

Since the stoichiometric ratio is 1:1, this also represents the number of moles of HBr that were neutralized.

Now, we can calculate the original volume of HBr using the concentration of the unknown solution:

Moles of HBr = 0.0375 mol

Concentration of HBr = unknown (let's assume it is C mol/L)

Volume of HBr = Moles of HBr / Concentration of HBr = 0.0375 mol / C mol/L

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Answer:

Which nuclear force holds the nucleus together against the mutual repulsion of the protons in every nucleus larger than Hydrogen’s?

Explanation:

Hi Arri, this is my question, if you cannot answer that it is fine. I hope you are doing well though :) best of luck to you when you are gone. Stay safe, well wishes

The two elements that do not have a second energy levels are Hydrogen (H) and Helium (He)

Energy levels are nothing but the 3-D spaces around the nucleus of an atom. The electrons revolve around the nucleus in their respective energy levels. Each energy levels can accommodate only a particular number of electrons.

For example, first energy level can accommodate only a maximum of 2 electrons whereas second energy level can accommodate 8 electrons.

Hydrogen has 1 electron and helium has 2 electrons around their respective nucleus. In both hydrogen and helium, electrons are accommodated in the first energy level.

Hence, the two elements that do not have a second energy levels are Hydrogen (H) and Helium (He)

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Answer:

I need the constant k (the rate at which the amount decays)

The value of Long Life Floors stock 5 years from today will be approximately $27.67 per share.

To calculate the value of the stock, we can use the dividend discount model (DDM). The DDM takes into account the present value of expected future dividends. In this case, the expected future dividends can be calculated by increasing the current dividend of $4 by 3 percent annually for five years. So, the expected dividends in five years would be $4 * (1 + 0.03)^5 = $4.62 per share.

Using a discount rate of 14 percent, we can calculate the present value of the expected future dividends. The formula for calculating the present value is: Present Value = Future Value / (1 + Discount Rate)^n, where n is the number of periods (in this case, 5 years).

Using the formula, the present value of the expected future dividends is: $4.62 / (1 + 0.14)^5 = $2.376 per share.

Therefore, the value of Long Life Floors stock 5 years from today is approximately $2.376 per share.

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Glycolysis has two steps. the first step is the energy investment where ATP is used to activate the glucose molecule.

The metabolic process that changes glucose towards pyruvate is known as glycolysis. The high-energy compounds adenosine triphosphate as well as reduced nicotinamide adenine dinucleotide are created using the free energy released throughout this process. Glycolysis would be a set of ten enzyme-catalyzed reactions.

Sugar molecules could be broken down during glycolysis to create the energy required for cellular metabolism. It happens in the cytoplasm of the cell. Thousands of ATP molecules are produced during glycolysis and are utilized for several types of cellular metabolism.

Therefore, Glycolysis has two steps. the first step is the energy investment where ATP is used to activate the glucose molecule.

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The movement of the continental plates is due to convection currents located at the Earth's mantle below the crust.

In conclusion, the movement of the continental plates is due to convection currents located at the Earth's mantle below the crust.

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Answer:

4,768.57

Explanation:

If you are asking us to calculate, your answer is above. Easiest and fastest way is to plug it into the calc.

30.6 g of ammonia are produced.

Answer:

given

mass of hydrogen =5.4 gram

mass of NH3=?

we have

3 moles of H2=2 moles of NH3

3×2g of H2=2×(14+3) g of NH3

6 g of H2=34 g of NH3

5.4 g of H2=34×5.4/6=30.6 g of NH3

30.6 g of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen.

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Mass of Hydrogen = 5.4 g

Moles of hydrogen = mass ÷ molar mass

                            = 5.4 ÷ 2 = 2.7 moles

From the reaction, 3 moles of hydrogen produce 2 moles of ammonia

So, 1 mole of hydrogen will produce 2 ÷ 3 moles of ammonia

Thus, 2.7 moles will give ( 2÷3) × 2.7

               = 1.8 moles of ammonia

Mass of ammonia = 1.8 × 17

                 = 30.6 g

Therefore, 30.6 g of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen.

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Answer:

18

Explanation:

use the equation 2n^2

The pressure of a gas is the force that a gas exerts per unit area of the container.

Pressure is defined as force per unit area. Gas molecules are constantly colliding against the walls of the container. The pressure of the gas is the force the gas is exerting on its container.

Since temperature is defined as the average kinetic energy of the molecules of a gas then the higher the temperature, the faster the particles move.

The volume of a container refers the size if the container.

The pressure of a gas is inversely proportional to its volume according to Boyle's law. Thus implies that if the pressure of the gas goes up, the volume has to go down.

For a compound to be called an acid, it must contain H+ and H3O+ when dissolved in water.

For a compound to be called a base, the compound must dissolve in water to yield hydroxide ions.

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Answer:

\([N_2]_{eq}=0.094M\)

\([O_2]_{eq}=0.094M\)

\([NO]_{eq}=0.002M\)

Explanation:

Hello,

In this case, for the given chemical reaction, we write the following law of mass action:

\(Keq=\frac{[N_2][O_2]}{[NO]^2}\)

That in terms of the change \(x\) due to the reaction extent (ICE procedure) we can write:

\(Keq=\frac{x*x}{([NO]_0-2x)^2}\)

Thus, the initial concentration of nitrogen monoxide is:

\([NO]_0=\frac{0.570mol}{3.0L} =0.19M\)

Thereby, we write:

\(2400=\frac{x*x}{(0.19-2x)^2}\)

That we can solve by suing the quadratic equation formula or solver to obtain two roots:

\(x_1=0.094M\\x_2=0.096M\)

Nevertheless, the correct answer is 0.094 M since the other root will produce a negative concentration of nitrogen monoxide at equilibrium, therefore, the equilibrium concentrations turn out:

\([N_2]_{eq}=x=0.094M\)

\([O_2]_{eq}=x=0.094M\)

\([NO]_{eq}=0.19M-2x=0.19M-2(0.094M)=0.002M\)

Best regards.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question we have

mass = 2.54 × 200

We have the final answer as

Hope this helps you

Answer: Plants Roots take in water through their roots.

Explanation:

Biosphere is the plant and hydrosphere is the water they take in so it has both so this is correct.

Answer:

Your answer is resonance.

ANSWER

The initial volume of the acid is 260mL

EXPLANATION

Given that;

The final volume of the ethanoic acid is 4.5L

The final concentration of the ethanoic acid is 1.0 mol/L

The initial concentration of the ethanoic acid is 17.4 mol/L

Follow the steps below to find the volume of the ethanoic acid

Step 1; Apply the dilution formula

Step 2; Substitute the given data into the formula

Therefore, the initial volume of the acid is 260mL